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Features
Regulated IOUT with ± 0.5% matching between constant current outputs
Drives one, two, three or four white LED's with no bias resistors
3.0V to 5.5V Input voltage
Up to 100mA output current
Active-High Enable Pin
Analog Brightness Control
Very small solution size
LLP-10 package: 3.0mm x 3.0mm x 0.8mm
Very Low Shutdown current (0.03µA typ.)
Description The LM3595 is a parallel white-LED driver that is capable of driving four white LEDs. It can supply a total output current
of 100mA over an input voltage range of 3.0V to 5.5V. The amount of constant current sourced to the outputs is user selectable
using one external sense resistor.
LM3595 typically draws 0.03µA when placed in shutdown, and 200µA when operating in the no-load condition. If any of the outputs
are not used, leave the pin(s) unconnected.
Brightness can be controlled by both analog and PWM techniques. A voltage between 0V and 3V may be applied to the BRGT pin
to vary the current. Output current will linearly track the voltage applied to the BRGT pin. An active-low level must be
present on the BR-ON pin for analog brightness control to be disabled. Alternatively, a PWM signal can be applied to the
EN pin to vary the perceived brightness of the LED.
The LM3595 uses an active-high enable level. The LM3595 is available in National's LLP-10 package.
Applications
Portable devices using white or blue LEDs with display and backlight or frontlight
Keypad LEDs
Strobe LEDs
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Also Recommended
| LM2794▲ | Switched-Capacitor Boost With 4 White LED Outputs And Active-Low Shutdown Pin |
| LM2795▲ | Switched-Capacitor Boost With 4 White LED Outputs And Active-High Shutdown Pin |
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